/Engine/Plugins/Developer/Concert/ConcertMain/Source/Concert/Public/ConcertMessageData.h
[EConcertServerFlags](API\Plugins\Concert\EConcertServerFlags) & operator^= ( [EConcertServerFlags](API\Plugins\Concert\EConcertServerFlags) & Lhs, [EConcertServerFlags](API\Plugins\Concert\EConcertServerFlags) Rhs )